In addition to the points themselves, box plots allow one to visually estimate the interquartilerange.

A range of data clustering techniques are used as approaches to density estimation, with the most basic form being a rescaled histogram.

To see this, we compare the construction of histogram and kernel density estimators using these 6 data points:
x1 = −2.1, x2 = −1.3, x3 = −0.4, x4 = 1.9, x5 = 5.1, x6 = 6.2
For the histogram, first the horizontal axis is divided into sub-intervals, or bins, which cover the range of the data.

interquartilerange (noun) The difference between the first and third quartiles; a robust measure of sample dispersion.

IQR means interquartilerange.
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For each part below, use a complete sentence to comment on how the value obtained from the data compares to the theoretical value you expected from the distribution in the section titled "Theoretical Distribution